png_exp           838 contrib/libtests/tarith.c          double error = png_exp(i) - correct;
png_exp           845 contrib/libtests/tarith.c                   " error: %f\n", i, png_exp(i), correct, error);
png_exp          3661 png.c             png_uint_32 x = png_exp(lg2);
png_exp          3676 png.c             png_uint_32 x = png_exp(lg2);